Sketch of the simulation volume. (a) Positions of the GPK1, GPK2 and GPK3 wells projected on the Earth surface. (b) The whole volume analysed. Blue plane, Earth surface; red plane, injection plane. (c) Positions of the GPK1, GPK2 and GPK3 wells projected on the injection plane. The pressure and temperature initial conditions on the plane are also indicated. (d) Initial pressure (blue) and temperature (red) conditions as a function of depth.